Methods and devices for reducing power consumption in a multi-processor computing device include filtering indications from the second processor intended for the first processor while the first processor is in a low power state, so that only selected, such as significant, indications are transmitted. Hydrocarbons, H2, andor other formation fluids may be produced from the formation. An upstream section upstream from the partition wall includes an outflow section that has a side surface in which outflow holes are formed that allow exhaust gas to flow out to the expansion chamber. In the high quality mode this control allows the ejection volume to be controlled in a wide temperature range, stabilizing the color reproduction. The supporting means, in use, locks the rigid surface in a work position in which the rigid surface allows the cavity to receive, through the recess, at least one upper limb of a user, the user lying on the supporting surface of mattress in a prone position or on one side.